diff --git a/apps/emqx_exhook/docs/design.md b/apps/emqx_exhook/docs/design-cn.md
similarity index 93%
rename from apps/emqx_exhook/docs/design.md
rename to apps/emqx_exhook/docs/design-cn.md
index 671e240cc..6686e96e3 100644
--- a/apps/emqx_exhook/docs/design.md
+++ b/apps/emqx_exhook/docs/design-cn.md
@@ -19,7 +19,7 @@
 2. 将 `emqx-extension-hook` 重命名为 `emqx-exhook`
 
 
-旧版本的设计参考：[emqx-extension-hook design in v4.2.0](https://github.com/emqx/emqx-exhook/blob/v4.2.0/docs/design.md)
+旧版本的设计：[emqx-extension-hook design in v4.2.0](https://github.com/emqx/emqx-exhook/blob/v4.2.0/docs/design.md)
 
 ## 设计
 
@@ -39,13 +39,13 @@
 `emqx-exhook` 通过 gRPC 的方式向用户部署的 gRPC 服务发送钩子的请求，并处理其返回的值。
 
 
-和 emqx 原生的钩子一致，emqx-exhook 也支持链式的方式计算和返回：
+和 emqx 原生的钩子一致，emqx-exhook 也按照链式的方式执行：
 
 <img src="https://docs.emqx.net/broker/latest/cn/advanced/assets/chain_of_responsiblity.png" style="zoom:50%;" />
 
 ### gRPC 服务示例
 
-用户需要实现的方法，和数据类型的定义在 `priv/protos/exhook.proto` 文件中。例如，其支持的接口有：
+用户需要实现的方法，和数据类型的定义在 `priv/protos/exhook.proto` 文件中：
 
 ```protobuff
 syntax = "proto3";
diff --git a/apps/emqx_exhook/rebar.config b/apps/emqx_exhook/rebar.config
index d2e437b8b..883aad9bd 100644
--- a/apps/emqx_exhook/rebar.config
+++ b/apps/emqx_exhook/rebar.config
@@ -1,11 +1,11 @@
 %%-*- mode: erlang -*-
 {plugins,
  [rebar3_proper,
-  {grpc_plugin, {git, "https://github.com/HJianBo/grpcbox_plugin", {tag, "v0.10.0"}}}
+  {grpc_plugin, {git, "https://github.com/HJianBo/grpc_plugin", {tag, "v0.10.2"}}}
 ]}.
 
 {deps,
- [{grpc, {git, "https://github.com/emqx/grpc", {tag, "0.6.0"}}}
+ [{grpc, {git, "https://github.com/emqx/grpc-erl", {tag, "0.6.2"}}}
 ]}.
 
 {grpc,
@@ -15,7 +15,9 @@
 ]}.
 
 {provider_hooks,
- [{pre, [{compile, {grpc, gen}}]}]}.
+ [{pre, [{compile, {grpc, gen}},
+         {clean, {grpc, clean}}]}
+]}.
 
 {edoc_opts, [{preprocess, true}]}.
 
diff --git a/apps/emqx_exhook/src/emqx_exhook_handler.erl b/apps/emqx_exhook/src/emqx_exhook_handler.erl
index 3a35073ca..c565d5dee 100644
--- a/apps/emqx_exhook/src/emqx_exhook_handler.erl
+++ b/apps/emqx_exhook/src/emqx_exhook_handler.erl
@@ -42,6 +42,12 @@
         , on_session_terminated/3
         ]).
 
+-export([ on_message_publish/1
+        , on_message_dropped/3
+        , on_message_delivered/2
+        , on_message_acked/2
+        ]).
+
 %% Utils
 -export([ message/1
         , stringfy/1
@@ -71,8 +77,15 @@
          , {'session.discarded',   {?MODULE, on_session_discarded,    []}}
          , {'session.takeovered',  {?MODULE, on_session_takeovered,   []}}
          , {'session.terminated',  {?MODULE, on_session_terminated,   []}}
+         %]).
+         , {'message.publish',     {?MODULE, on_message_publish,   []}}
+         , {'message.delivered',   {?MODULE, on_message_delivered, []}}
+         , {'message.acked',       {?MODULE, on_message_acked,     []}}
+         , {'message.dropped',     {?MODULE, on_message_dropped,   []}}
          ]).
 
+
+
 %%--------------------------------------------------------------------
 %% Clients
 %%--------------------------------------------------------------------
@@ -185,6 +198,45 @@ on_session_terminated(ClientInfo, Reason, _SessInfo) ->
             reason => stringfy(Reason)},
     cast('session.terminated', Req).
 
+%%--------------------------------------------------------------------
+%% Message
+%%--------------------------------------------------------------------
+
+on_message_publish(#message{topic = <<"$SYS/", _/binary>>}) ->
+    ok;
+on_message_publish(Message) ->
+    Req = #{message => message(Message)},
+    case call_fold('message.publish', Req,
+                   fun emqx_exhook_handler:merge_responsed_message/2) of
+        {StopOrOk, #{message := NMessage}} ->
+            {StopOrOk, assign_to_message(NMessage, Message)};
+        _ -> {ok, Message}
+    end.
+
+on_message_dropped(#message{topic = <<"$SYS/", _/binary>>}, _By, _Reason) ->
+    ok;
+on_message_dropped(Message, _By, Reason) ->
+    Req = #{message => message(Message),
+            reason => stringfy(Reason)
+           },
+    cast('message.dropped', Req).
+
+on_message_delivered(_ClientInfo, #message{topic = <<"$SYS/", _/binary>>}) ->
+    ok;
+on_message_delivered(ClientInfo, Message) ->
+    Req = #{clientinfo => clientinfo(ClientInfo),
+            message => message(Message)
+           },
+    cast('message.delivered', Req).
+
+on_message_acked(_ClientInfo, #message{topic = <<"$SYS/", _/binary>>}) ->
+    ok;
+on_message_acked(ClientInfo, Message) ->
+    Req = #{clientinfo => clientinfo(ClientInfo),
+            message => message(Message)
+           },
+    cast('message.acked', Req).
+
 %%--------------------------------------------------------------------
 %% Types
 
diff --git a/apps/emqx_exproto/rebar.config b/apps/emqx_exproto/rebar.config
index 88831ce15..61677f0e3 100644
--- a/apps/emqx_exproto/rebar.config
+++ b/apps/emqx_exproto/rebar.config
@@ -9,11 +9,11 @@
             {parse_transform}]}.
 {plugins,
  [rebar3_proper,
-  {grpc_plugin, {git, "https://github.com/HJianBo/grpcbox_plugin", {tag, "v0.10.0"}}}
+  {grpc_plugin, {git, "https://github.com/HJianBo/grpc_plugin", {tag, "v0.10.2"}}}
 ]}.
 
 {deps,
- [{grpc, {git, "https://github.com/emqx/grpc", {tag, "0.6.0"}}}
+ [{grpc, {git, "https://github.com/emqx/grpc-erl", {tag, "0.6.2"}}}
  ]}.
 
 {grpc,
@@ -21,10 +21,12 @@
   {protos, ["priv/protos"]},
   {gpb_opts, [{module_name_prefix, "emqx_"},
               {module_name_suffix, "_pb"}]}
- ]}.
+]}.
 
 {provider_hooks,
- [{pre, [{compile, {grpc, gen}}]}]}.
+ [{pre, [{compile, {grpc, gen}},
+         {clean, {grpc, clean}}]}
+]}.
 
 {xref_checks, [undefined_function_calls, undefined_functions,
                locals_not_used, deprecated_function_calls,